21100100110 has 16 divisors (see below), whose sum is σ = 38099997216. Its totient is φ = 8413414048.

The previous prime is 21100100093. The next prime is 21100100143. The reversal of 21100100110 is 1100100112.

It is a junction number, because it is equal to n+sod(n) for n = 21100100093 and 21100100102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3324922 + ... + 3331261.

It is an arithmetic number, because the mean of its divisors is an integer number (2381249826).

Almost surely, 2^21100100110 is an apocalyptic number.

21100100110 is a deficient number, since it is larger than the sum of its proper divisors (16999897106).

21100100110 is a wasteful number, since it uses less digits than its factorization.

21100100110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6656507.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 21100100110 its reverse (1100100112), we get a palindrome (22200200222).

The spelling of 21100100110 in words is "twenty-one billion, one hundred million, one hundred thousand, one hundred ten".